PSLE A bag contains erasers of three different colours.
16 of the erasers are orange. The ratio of the number of brown erasers to that of purple erasers is 1 : 1. What is the ratio of the number of orange erasers to that of purple erasers?
Orange |
Brown |
Purple |
Total |
1x2 |
5x2 |
6x2 |
|
1x5 |
1x5 |
|
2 u |
5 u |
5 u |
12 u |
The total number of purple and brown erasers is the combined repeated identity.
Make the total number purple and brown erasers the same.
LCM of 5 and 2 = 10
Orange : Purple
2 : 5
Answer(s): 2 : 5